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13 December, 18:02

Quiz 3

A bag contains 2 red marbles, 3 green marbles, and 4 blue marbles.

If we choose a marble, then another marble without putting the first one back in the bag, what is the

probability that the first marble will be green and the second will be red?

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  1. 13 December, 19:06
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    1/12

    Step-by-step explanation:

    2 red marbles + 3 green marbles + 4 blue marbles = 9 marbles

    First drawing:

    You want a green marble out of 3 green marbles out of the total of 9 marbles.

    p (green marble) = 3/9 = 1/3

    Second drawing:

    After drawing the green marble, there are 8 marbles left. There are 2 red marbles.

    p (red marble) = 2/8 = 1/4

    p (green then red) = 1/3 * 1/4 = 1/12
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